Bon, j'ai trouvé la ligne de commande pour revenir au bureau ubuntu gnome :
Citer:
sudo apt-get remove abiword abiword-common abiword-plugins brasero dbus-x11 gnumeric-common gnumeric-gtk gqview gtk2-engines-murrine gtk2-engines-xfce libaiksaurus-1.2-0c2a libaiksaurus-1.2-data libaiksaurusgtk-1.2-0c2a libexo-0.3-0 libgdome2-0 libgdome2-cpp-smart0c2a libglib2.0-data libgoffice-0-common libgoffice-gtk-0-4 libgsf-gnome-1-114 libgtkmathview0c2a libjpeg-progs liblink-grammar4 libmodplug0c2 libmpcdec3 libots0 libpulse0 libt1-5 libtagc0 libthunar-vfs-1-2 libwpd-stream8c2a libxcb-shape0 libxcb-shm0 libxcb-xv0 libxcb1 libxfce4mcs-client3 libxfce4mcs-manager3 libxfce4util4 libxfcegui4-4 libxine1 libxvmc1 link-grammar-dictionaries-en mousepad mozilla-thunderbird orage python-exo tango-icon-theme tango-icon-theme-common thunar thunar-archive-plugin thunar-data thunar-media-tags-plugin thunar-volman thunderbird totem-xine vim-runtime xfce4-appfinder xfce4-battery-plugin xfce4-clipman-plugin xfce4-cpugraph-plugin xfce4-dict-plugin xfce4-fsguard-plugin xfce4-icon-theme xfce4-mailwatch-plugin xfce4-mcs-manager xfce4-mcs-plugins xfce4-mixer xfce4-mixer-alsa xfce4-mount-plugin xfce4-netload-plugin xfce4-notes-plugin xfce4-panel xfce4-places-plugin xfce4-quicklauncher-plugin xfce4-screenshooter-plugin xfce4-session xfce4-smartbookmark-plugin xfce4-systemload-plugin xfce4-terminal xfce4-utils xfce4-verve-plugin xfce4-weather-plugin xfce4-xkb-plugin xfdesktop4 xfdesktop4-data xfprint4 xfwm4 xfwm4-themes xubuntu-artwork-usplash xubuntu-default-settings xubuntu-desktop xubuntu-docs && sudo apt-get install ubuntu-desktop